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December Weather in Callahan, United States

Last updated: June 24, 2025

In Callahan, United States, the average temperature in December hovers around 14°C (58°F). Expect a range from a chilly -3°C (27°F) to a warm 28°C (84°F). During this month, you can also anticipate about 85 mm (3.3 in) of precipitation over 7 days, with an average humidity level of a comfortable 85%.

December Temperature in Callahan

In December in Callahan, the average temperature is 14°C (58°F). The maximum can reach 28°C (84°F), and the minimum can be as low as -3°C (27°F). Be prepared for a wide range of temperatures if you're traveling during this time.

December Weather in Callahan: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Callahan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Callahan, December typically has an average temperature of 14°C (58°F), with highs reaching up to 28°C (84°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec556164697579818179746358
Data source: Temperature data for Callahan generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Callahan

In Callahan in December, the total precipitation amount is 85 mm (3.3 in) over the course of 7 days.

December Precipitation Trends in Callahan

The chart displays monthly precipitation patterns in Callahan, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Callahan, December typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec4569416686170196190157746485
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Callahan

In Callahan in December, humidity is 85%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket wrapping around you, making even short walks feel heavy and exhausting for traveling.

December Average Humidity in Callahan

This chart illustrates the average monthly humidity levels in Callahan, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Callahan is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%79%78%73%72%74%82%82%83%79%82%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Callahan

In Callahan in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Callahan.

Maximum UV Index Levels in Callahan for December

The chart shows the monthly maximum UV Index (UVI) for Callahan in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Callahan typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111111111110865
Data source: Callahan December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Callahan Compares to Other Months

Weather in Callahan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Callahan, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Callahan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)45 mm (1.8 inches)84%moderate
February Weather16°C (61°F)69 mm (2.7 inches)79%high
March Weather18°C (64°F)41 mm (1.6 inches)78%very high
April Weather21°C (70°F)66 mm (2.6 inches)72%extreme
May Weather24°C (76°F)86 mm (3.4 inches)72%extreme
June Weather26°C (80°F)170 mm (6.7 inches)74%extreme
July Weather27°C (81°F)196 mm (7.7 inches)82%extreme
August Weather27°C (81°F)190 mm (7.5 inches)82%extreme
September Weather26°C (80°F)157 mm (6.2 inches)83%very high
October Weather23°C (74°F)74 mm (2.9 inches)79%very high
November Weather17°C (63°F)64 mm (2.5 inches)82%high
December Weather14°C (58°F)85 mm (3.3 inches)85%moderate

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